A research of colloidal silver immobilization in bionanocomposites of natural polymers and montmorillonite
Currently, colloidal silver particles are used in the creation of electronic, optical, and sensor devices of a new generation. Silver-containing bionanocomposites (BNCs) were synthesized by immobilization of colloidal montmorillonite particles containing colloidal silver in a composition of sodium alginate and sodium salt of carboxymethylcellulose. Silver-containing montmorillonite particles Ag-Mt were obtained by replacing Na+ ions in layered silicate galleries with Ag+ ions, followed by the transformation of silver ions into silver particles. The introduction of Ag+ ions into the montmorillonite structure is justified by infrared spectroscopy. When studying the strength of bionanocomposite films, it was found that with an increase in the content of Ag-Mt particles in their composition, the strength increases and the deformation decreases.
It is found that the equilibrium values of the swelling constant are set in ~30 minutes. At the same time, with an increase in the Ag-Mt content in the bionanocomposite from 3 % to 10 %, the value of the equilibrium swelling coefficient (Kswell) decreases by 2.8 times. The replacement of Na+ ions with Ag+ ions in the montmorillonite structure is accompanied by a decrease in the swelling of bionanocomposites, which is explained by the lower hydration of Ag+ ions compared to Na+ ions. As another reason for the decrease in the swelling of bimonanocomposites with an increase in the proportion of Ag-Mt in their composition, enhancing their ability to structure formation in the prersence of a clay mineral is indicated.
The kinetics of the release of Ag+ ions from bionanocomposites into saline has been studied. It is shown that the release of Ag+ ions increases with increasing pH of the medium
How to cite paper:
Musabekov, K., Zhakyp, B., Tazhibayeva, S., Musabekov, N., & Yergaliyeva, A. (2020). A research of colloidal silver immobilization in bionanocomposites of natural polymers and montmorillonite. Eastern-European Journal of Enterprise Technologies, 6(6 (108), 93–101. https://doi.org/10.15587/1729-4061.2020.216995